Method for preparing high-color-gamut white-light LED through employing green-light fluorescent powder

A realization method, the technology of red light phosphor, applied in the field of white light LED backlight, can solve the problems of low color gamut value of backlight source, difficult to control particle size, poor color reproduction, etc., achieve simple packaging process, high excitation efficiency, and equipment less demanding effect

Active Publication Date: 2016-06-22
SHENZHEN JUFEI OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the color gamut value of the white light LED backlight source in the prior art is low, the degree of color reproduction is poor, the excitation efficiency is low, and the particle size is difficult to control. 4 :Er 3+ Realization method of high color gamut white LED with green phosphor

Method used

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  • Method for preparing high-color-gamut white-light LED through employing green-light fluorescent powder

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Embodiment 1

[0036] This embodiment provides a method using MASiO 4 :Er 3+ A method for realizing a white light LED with a high color gamut of green phosphor powder, comprising the following steps:

[0037] 1) According to the mass ratio of 3:1, weigh 7.20g of packaging glue A and 2.40g of packaging glue B, and mix them evenly to obtain a mixed packaging glue. The packaging glue A and the packaging glue B are both epoxy Class encapsulation glue, the viscosity of the mixed encapsulation glue is 600mPa·S, and the refractive index is 1.45;

[0038] 2) Weigh the fluorescent powder according to the emission wavelength of the chip: the chip is an ultraviolet chip, and the emission peak is 300nm. According to the mass ratio of 4:1:5, weigh 0.68g of silicate red fluorescence with a peak wavelength of 640nm powder, 0.17g of MASiO with a peak wavelength of 530nm 4 :Er 3+ Green fluorescent powder and 0.85g of nitride blue fluorescent powder with a peak wavelength of 458nm, three kinds of phosphors ...

Embodiment 2

[0042] This embodiment provides a method using MASiO 4 :Er 3+ A method for realizing a white light LED with a high color gamut of green phosphor powder, comprising the following steps:

[0043] 1) According to the mass ratio of 10:1, weigh 5.80g of packaging glue A and 0.58g of packaging glue B, and mix them evenly to obtain a mixed packaging glue. The packaging glue A and the packaging glue B are silicone A type of encapsulation glue, the viscosity of the mixed encapsulation glue is 4200mPa·S, and the refractive index is 1.50;

[0044] 2) Weigh the fluorescent powder according to the emission wavelength of the chip: the chip is an ultraviolet chip, and the emission peak value is 365nm. According to the mass ratio of 10:1:4.5, weigh 4.00g of silicate red fluorescence with a peak wavelength of 626nm powder, 0.40g of MASiO with a peak wavelength of 535nm 4 :Er 3+ Green fluorescent powder and 1.80g of nitride blue fluorescent powder with a peak wavelength of 472nm, three kind...

Embodiment 3

[0048] This embodiment provides a method using MASiO 4 :Er 3+ A method for realizing a white light LED with a high color gamut of green phosphor powder, comprising the following steps:

[0049] 1) Weigh 5.40g of encapsulation glue A and 2.70g of encapsulation glue B according to the mass ratio of 2:1, and mix them evenly to obtain a mixed encapsulation glue. The encapsulation glue A and the encapsulation glue B are epoxy Class encapsulation glue, the viscosity of the mixed encapsulation glue is 4300mPa·S, and the refractive index is 1.43;

[0050] 2) Weigh the fluorescent powder according to the emission wavelength of the chip: the chip is an ultraviolet chip, and the emission peak is 398nm. According to the mass ratio of 1:1:2.5, weigh 4.20g of silicate red fluorescence with a peak wavelength of 600nm powder, 4.20g of MASiO with a peak wavelength of 539nm 4 :Er 3+ Green fluorescent powder and 10.50g of aluminate blue fluorescent powder with a peak wavelength of 480nm, thr...

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Abstract

The invention discloses a method for preparing a high-color-gamut white-light LED through employing green-light fluorescent powder, and the method comprises the steps: 1), weighing different fluorescent powder according to a transmission wavelength of a chip, and adding the fluorescent powder to mixed packaging glue, wherein the chip is an ultraviolet chip or a blue-light chip; 2), enabling the mixture, obtained at step 1), to be stirred uniformly and then to be dripped into an LED support cup housing provided with the chip; 3), carrying out the solidifying of the packaging glue, and obtaining a white-light LED lamp bead. The green-light fluorescent powder employed in the method is MAlSiO4: Er3+ green-light fluorescent powder, is high in color purity, and can remarkably improve the color gamut value of an LED backlight lamp bead to 85% or more. The white-light LED is used for liquid crystal backlight, and can enable the color reduction degree of a display screen to be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of white light LED backlights, and in particular relates to a method for realizing a high color gamut white light LED using green fluorescent powder. Background technique [0002] LED backlight refers to the use of LEDs as the backlight of liquid crystal displays. Compared with traditional CCFL backlights, LED backlights have many advantages such as high color gamut, high brightness, long life, energy saving and environmental protection, and real-time color controllability. The advanced LED backlight makes the screens of electronic products such as TVs, mobile phones, and tablet computers that use it have more vivid colors and a higher degree of color reproduction. [0003] In order to make the color of the display screen more perfect, richer in color, and closer to real-world colors, many R&D technicians are committed to finding and improving the color gamut value of the LED backlight display screen. The so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50C09K11/64
CPCC09K11/646H01L33/504H01L2933/0041Y02B20/00
Inventor 高丹鹏张志宽邢其彬
Owner SHENZHEN JUFEI OPTOELECTRONICS
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